package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;
    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal =new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //为套餐表新增套餐
        setmealMapper.insert(setmeal);
        //拿到该套餐的ID
        Long seatmealId = setmeal.getId();
        //为套餐中添加具体的每个菜品
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(seatmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);


    }

    //套餐分页查询
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            //删除套餐中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐中的菜品数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    //根据id查询套餐
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal =setmealMapper.getById(id);
        List<SetmealDish> setmealDishes= setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //1.修改套餐表，执行update
        setmealMapper.update(setmeal);
        //套餐ID
        Long setmealId=setmealDTO.getId();
        //2.删除套餐和菜品的关联信息，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3.重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品时提示“套餐内含有为起售菜品，无法起售”
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList=dishMapper.getBySetmealId(id);
            if(dishList!=null&&dishList.size()>0){
                dishList.forEach(dish -> {
                    if(dish.getStatus()==StatusConstant.DISABLE)
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                });
            }
        }

        Setmeal setmeal=Setmeal.builder()
                .status(status)
                .id(id).build();
        setmealMapper.update(setmeal);
    }

    //根据分类ID查询套餐
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal>  setmealList = setmealMapper.list(setmeal);
        return setmealList;


    }

    //根据套餐ID查询菜品信息
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        List<DishItemVO> dishItemVOList=setmealMapper.getDishItemById(id);
        return dishItemVOList;
    }
}
